Comparison of biochar, zeolite and their mixture amendment for aiding organic matter transformation and nitrogen conservation during pig manure composting
The research paper investigates the effects of biochar, zeolite, and their combination on the composting process of pig manure (PM) mixed with wheat straw. The study aims to assess how these amendments influence organic matter degradation, nitrogen conservation, and the overall quality of the compost produced. Four treatments were established: a control (no additives), and three treatments with 10% biochar (B), 10% zeolite (Z), and a mixture of both (B + Z).
Results indicated that all amendments significantly improved organic matter degradation and reduced nitrogen loss compared to the control. The combination of biochar and zeolite (B + Z) was particularly effective, achieving the highest reductions in ammonia (63.40%) and nitrogen dioxide (78.13%) emissions. The study also highlighted that the combined use of these additives enhanced organic matter humification and reduced the mobility of heavy metals in the compost.
The research underscores the environmental challenges posed by intensive pig production, particularly the management of large quantities of manure, which can lead to soil and water pollution if not handled properly. Composting is presented as a sustainable solution, transforming PM into a stabilized organic fertilizer. However, traditional composting processes often result in high ammonia emissions and insufficient organic matter transformation. The study suggests that using mineral additives like biochar and zeolite can mitigate these issues, promoting a more efficient composting process.
This research paper is significant in the field of agricultural waste management and environmental sustainability. It contributes to ongoing discussions about improving composting practices, particularly in the context of intensive livestock production, which is a growing concern in many regions, including China. By demonstrating the benefits of using biochar and zeolite, the study provides practical insights for farmers and composting facilities looking to enhance compost quality while minimizing environmental impacts. The findings can inform policy decisions and best practices in waste management, promoting more sustainable agricultural practices.
